Spring - MVC Tag Library

In SPring WEB MVC based applications, to prepare Presentation or View part we are able to use

basic View technologies like HTML, JSP, JSTL , Velocity , Free Marker,......

In Spring WEB MVC based applications, to prepare User Forms Spring WEB MVC framework has

given a seperate tag library.

To use Spring WEB MVC web applications if we want to use Spring provided tag library then we

have to use keep spring-webmvc.jar in web application lib folder and we have to use the following

URL in "uri" attribute in <taglib> directive.

http://www.springframework.org/tags/form

EX: <%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>

Spring has provided the following set of form tags to prepare User forms.

1.<form:form>

It is same as html <form> tag, it will gather/group all other Html components to take data from

users inorder to submit data to Server side application.

Syntax:

<form:form method=-- action=-- commandName=--->

</form:form>

Where method attribute will take HTTP-Method like GET or POST,....

Where action attribute will take action URI of the respective ontroller class.

Where commandName attribute will take Command class object logical name , which

must be same as the value which is specified along with commandName property in

controller class configuration in Spring configuration file inorder to store form data in the

Command class object.

EX:

registrationform.jsp

<form:form method=POST action=reg commandName=user>

</form:form>

User.java

public class User{

----

}

ds-servlet.xml

<beans>

-----

<bean name="reg" class="com.durgasoft.controller.RegistrationController">

<property name="commandName" value="user"/>

<property name="commandClass" value="com.durgasoft.command.User"/>

-----

</bean>

----

</beans>

This tag is same as HTML <input type=text/> tag, it will create textfield in user form , it is an input

GUI component, it will take a line text data from Users.

Syntax:

<form:input path="--" size="--" value="--"/>

Where "path" attribute will take reference name to the text field and it must be same as a

property in Command class having setter and getter method.

Where "size" attribute will take textfield size.

Where "value" attribute will take a default message to display while preparing text field.

<form:form .... >

User Name<form:input path="uname" size="20"/>

</form:form>

In Command class, we must declare "uname" as String property.

public class User{

----

private String uname;

----

public void setUname(String uname){

this.uname = uname;

}

public String getUname(){

return uname;

}

----

}

It will generate password field in user form, it is same as "<input type="password"/>" tag, it will

take password data from users.

Syntax:

<form:password path="--" value="--" showPassword="--"/>

Where "path" atribute will take reference name to the password field, it must be same as

the property defined in the respective Command class having setter and getter methods.

Where "value" atrribute will take default password value to display while creating password

field.

Where "showPassword" property will take either true/false value to show or not to show

password data in password field while providing password data.

EX:

<form:form ----->

User Password<form:password name="upwd" showPassword="false"/>

</form:form>